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Heavy Rains and Potential for Flash Floods

Severe thunderstorms with damaging winds and heavy rains will be possible from the Ohio Valley to the Northeast Tuesday. In addition, heavy rains possible in the central Plains and southern Rockies. Heavy rain threat moves into the southern Mid-Atlantic Wednesday. Dry conditions remain out west where isolated dry thunderstorms could exacerbate ongoing fires and start new fires. Read More >

Hazardous Weather Conditions

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72° N Lon: 96.67° W Elev: 748 ft.

Fair

75°F

24°C

Humidity 89%
Wind Speed S 7 mph
Barometer 30.04 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 22 Aug 4:55 am CDT
Detailed forecast for

Grayson County

Today
Mostly sunny. Highs in the mid 90s. South winds 5 to 10 mph.
Tonight
Mostly cloudy with a 50 percent chance of showers and thunderstorms. Lows in the lower 70s. Southeast winds around 5 mph shifting to the northeast after midnight.
Wednesday
Mostly cloudy in the morning...then becoming partly sunny. A 50 percent chance of showers and thunderstorms. Humid with highs in the upper 80s. Northeast winds around 5 mph.
Wednesday Night
Mostly cloudy with a 30 percent chance of showers and thunderstorms. Lows in the upper 60s. Northeast winds around 5 mph.
Thursday
Partly sunny with a 20 percent chance of showers and thunderstorms. Highs in the upper 80s. East winds 5 to 10 mph.
Thursday Night
Partly cloudy. Lows in the upper 60s.
Friday
Mostly sunny. Highs in the upper 80s.
Friday Night
Partly cloudy in the evening...then becoming mostly cloudy. Lows around 70.
Saturday
Partly sunny in the morning...then becoming mostly cloudy. A slight chance of showers and perhaps an isolated thunderstorm. Highs in the mid 80s. Chance of rain 20 percent.
Saturday Night
Mostly cloudy with a slight chance of showers and perhaps an isolated thunderstorm. Lows around 70. Chance of rain 20 percent.
Sunday
Mostly cloudy in the morning...then becoming partly sunny. A slight chance of showers and perhaps an isolated thunderstorm. Highs in the mid 80s. Chance of rain 20 percent.
Sunday Night
Partly cloudy. Lows in the upper 60s.
Monday
Mostly sunny. Highs in the upper 80s.



Click Map For Forecast
409 AM CDT Tue Aug 22 2017
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database